The cost of my portfolio for the last six months has decreased by 20 times, I'm the only one?) How are you doing, you sell below or wait, my expectations lead to the fact that the bottom is getting even lower!
If it is 20 times lower than your initial price then you might have inevsted when the prices were 20x the current one for all of them. That sounds unrealistic because we never had that much prices.
I am sure you might be 20% down in the trend line and I think that is not much challenging as that is the most normal drop one can ever have. Gaining 20% after the bearish start is not big deal. I think you should just wait for the right time and then sell your coins.